Feed-water-heating system



Sept. 18, 1928. 1,684,965

B. F MADISON ET AL FEED WATER HEATING SYSTEM Filed Jgly 6, 1926 Patented Sept. 18, 1928.

- UNITED STATES BENJAMI F. mnnrson AND ELBERT fc. KRUME, on oonnorr. nnnrrsyrown.

FEED-WATER-HEATING SYSTEM. 7

Application filed July 6, 1926-. Serial No. 120,845.

Our invention relates to improvements in feed water heating systems wherein the feed water is inducted through the fire box and into the water space of the'boiler. The objects of our invention are, first, to deliver the water into the .boiler of a steam engine at a much higher temperature than has heretofore been attainable; second, to

provide a circulation in the heating tube of the feed water with the boiler water; third, to provide a means for the greater circulation of the water in the boiler when not being supplied with feed water; fourth, to provide a quick and easy means of disconnecting the return pipes and the injectors for the purpose of cleaning of the heating tube for the feed Water; and, fifth, to provide a quick and easy means for cutting out 4 the circulatory system connected with said feed water supply. I n q We attain these objects by the device illus trated in the accompanying drawing, in which'- p Figure 1 is a side elevation of a boiler with our device attached; and Fig. 2, a plan view of our device showing the injectors attached.

Similar numerals refer v tosimilar parts throughout the several views.

A water tight opening is supplied in the frontsheet of the fire boxat 15, through which opening is passed a corrugated pipe 3 forming a section of a longitudinal supply pipe composed of the said pipe section 3 and a pipe section 4. This pipe 3 is screwed into a ground joint coupling 14 which is ground into a ring 11 welded to the back head of the fire box 8. A flanged coupling 13 is attached to the ground coupling 14 and the feed pipe 4 is located entirely within the boiler shell. The feed pipe 4 is screwed into the coupling 18. The coupling 14 makes a ground joint with ring 11. i The corrugated supply pipe 3 is placed immediately below the crown sheet 16 in the fire box of the boiler, whose shell is 9. Exteriorly arranged longitudinally disposed return pipes 5 and 5 are located at opposite sides of the boiler and their front ends are connected with the lower portion of the shell 9 of the boiler at the front end thereof and their rear ends are connected pipe. lire box into the boiler and extends along the PATENT OFFECEQ ends with cut'oif. valves 12 and 12 and are equipped near their rear ends with cut err valves 6 and 6. The return pipes extend horizontally from the front portion of the boiler to the rear end thereof and'are pro topoints in rear of the fire box and the said return pipes have rear transverse portions which are connected with the supply The supply pipe extends through the same int'eriorly thereof to a point midway between the ends of the boiler. A check valve 2 is arranged in the supply pipe in rear of the point where the transverse portions of 'vided at opposite sides of the fire boxwith the return pipes are connected to the supply pipe A pair of injectors 1 and 1 are, connected with the supply pipe at the rear end thereof. A cut-off 17 is supplied at the outermost end of the supply pipe 3 and usually two injectors are supplied at the connection with said cut-off 17 to the sup ply pipe 3. The injectors have their water supply pipes 18 and 18 and their steam supply 17 and 17', respectively. v

lVhen' it is desired to feed the' boiler water one or both of the injectors 1 and '1, are put in operation. The .cut off 17 is opened. The water will be forced'through the check valve 2 into the supply pipe 3 which is already carrying a supply ofwater from the return pipes 5 and 5 through the fire box into the middle position of the boiler whose shell is 9. Thus will the feed water be heated before flowing into the hot water of the boiler. By reason of the larger surface proportionate to the amount of water conveyed through the supply pipe 8, the

temperature of the water will be brought up to a higher heat than that heated by the surrounding sheets of the fire box, and hence the feed water will be brought up to a temperature equal to or greater than that of the other water in the boiler. The cut-offs 12, 6 and l2 and 6' are used only in emergency when something happens to the return pipes 5 or 5 of the boiler. Thus, when the supply pipe 3 is, not being used to, feedthe boiler through the injectors 1 and 1, its temperature will be kept down by the sup-' ply of water from the cooler portion of the forward end of the boiler and near the bottom, and the heating surface of the supply the return pipes b and the water received from the return pi es 5 and 5' so that'the supply pipe? wil not burn out. V v Ofcourse it will readily be observed that may be returned from any part of the boiler, as from the front head of the boiler, but we prefer to a. return them from the front and cooler part,

of the Water of the boiler.

7 What weidesireito claimand secure by Letters Patent is: i

1;, The combination with a locomotive :boiler having a fire box, ota longitudinal supply pipe iaving a. portion extending for? Wardly andupwardl through thet fire box 'at a point beneath t 1e crownslreet ofthesame and passingthrough the tube sheet into the boiler and extending forwardly in-the barrelof the boiler to a point intermediate of'the ends of the same, a pairof longia tudinally disposed exteriorly arranged pipeslocated at opposite sides of the boiler and connectedat their front endsto the boiler, at.

thelower portion of the semeand above the bottomthereof and extending. horizontally to points adjacent the firebox and provided thereat with transversely disposed rear por,

, tions. connected toYthe, supply pipe in rear of the. fire box, a pair oftransversely-disposed injectors connected to the supply pipe in rear of the said transverse portions of the exterior pipes, and independent means for controllingvthe flowv ofwater throughQt-he wardly through the fire box beneath the crownisheet oti the sameandwpassing through? the. tube sheet into the. boiler barrel; saidf. supply pipe extending forwardly vwithin the v v supplfpipe andthe exterior pipes.

, 2. lie combination with" a locomotive boilerihavingga fire box, of'a longitudinal supplypipehaving apportion: arranged at an.

inclination and extending forwardly and. up-

boiler to a point intermediete the fendsof the sarne,-a pair of longitudinally disposed ex- Y teriorly arranged pipes located at opposite 4 sides of the boiler and connected at their I frontenrls totheboiler-a't the lower portion of the same above the bottom thereof and extendinghorizontally to points at opposite, 7 sides of the fire box, said exterior pi es {being provided in rear of the fire box with transversely disposed portions connected to i the supply a at the rear portion thereof, :means locate V inreariofi thefire. box and communicating with the 'su' plying ,waterrto the Samoan circulation through: the. said pipes r 3h The combination." with a locomotive boiler; having a fire jbox, of a longitudinal" supply pipehaving a portion arranged-latte,

an vinclination. and extendi forwardly and upwardly through the'fire oxgbeneath the crown sheet of the sameandpassingthroughf the tube sheetinto the boiler barrehl a" of longitudinally] disposed exteriorly ar- 65,

ranged pi es locatediato osite sidesofthe boiler an ,oonneoted att ir frontfjends" to the boiler at the lower portionoftli'e same andfabove the bottom thereofyand extendingu horizontally to d the fire box, said exterior 'peswbeing pro vided. inv rear. of the fire. bx with transthrough the exterior pipes andi it hrouglilthe r lyr p a ,BENJAMIN'F. MADISON. ELBERT I U pipe for sup-l qor stimulating, i

pints atoppositevsides of flo for supplying-water to; 

